# Copyright 2021 Huawei Technologies Co., Ltd
#
# Licensed under the BSD 3-Clause License  (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://opensource.org/licenses/BSD-3-Clause
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from abc import ABCMeta, abstractmethod

from mmcv.runner import BaseModule


class BaseHead(BaseModule, metaclass=ABCMeta):
    """Base head."""

    def __init__(self, init_cfg=None):
        super(BaseHead, self).__init__(init_cfg)

    @abstractmethod
    def forward_train(self, x, gt_label, **kwargs):
        pass
